5-day weather forecast Reykjavík Sep 5, 2026

9° · Patchy rain possible

Weather forecast Reykjavík tomorrow Sep 5, 2026: patchy rain possible, temperature from 8 °C to 9 °C.

Precipitation probability 27%. Wind up to 4.89 m/s (gusts 9.69 m/s). Air humidity 64–74%, atmospheric pressure 752–757 mm Hg, UV index up to 1.3.

5 days at a glance — tap a day to open it
Sunrise 06:22
Sunset 20:30
Waning Crescent29% illuminated
Moonrise does not rise today · Moonset does not set today
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Forecast from 8 °C to 9 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)888888888888888888889999
Precipitation (mm/hr)0.070.070.070.070.040.060.060.040.030.020.030.030.030.020.010.010.010000000

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)1001001001001001001001001001001009980755866885433355
Rain chance (%)27272727232424222120201916141112155555555

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)4.614.894.814.393.893.613.53.53.192.892.692.893.113.313.53.393.6944.314.694.613.813.393.5
Wind gust (m/s)9.617.897.818.394.033.813.613.533.313.112.812.928.117.317.58.396.6988.319.698.618.818.397.5
Wind direction (°)WSW 255°WSW 254°WSW 254°WSW 257°W 260°W 262°W 264°W 266°W 273°W 278°W 280°W 280°WNW 282°WNW 286°WNW 296°WNW 299°NW 305°NW 310°NW 315°NW 324°NNW 327°NNW 327°NNW 334°NNW 344°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)747474747271706968686767676868676666656565646465

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)752752753753754754754755755755755756756756756757756757757757757757757757

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index000000000.10.20.50.71.11.31.310.80.60.40.20000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)1.51.51.7221.91.61.92.52.82.421.71.51.51.61.822.42.52.42.42.42.3
PM10 (µg/m³)6.56.56.876.56.46.86.86.97.27.16.85.85.95.95.95.65.65.85.56.16.25.85.6
Ozone (O₃) (µg/m³)656565656565646465656669697069696968686664605859
NO₂ (µg/m³)0.90.911.11.11.21.51.721.71.310.90.90.90.90.911.11.72.22.733.2
SO₂ (µg/m³)0.60.70.70.81.21.51.82.22.52.51.91.40.90.50.50.50.50.50.50.50.50.50.60.7
CO (µg/m³)154154153154154155160161162162164160155157156155154155155156158160163162

Reykjavík on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.